What is a testable hypothesis? Why is it critical to the scientific method?
Provides definitive evidence that proposed relationships are correct or that they are wrong
What are plate tectonics? What evidence was used to support the theory of plate tectonics (both original and modern)?
Plate tectonics is the theory that encompasses continental drift, sea floor spreading and related aspects of crustal movement.
Original: the rock sequences correlated, index fossils correlated, paleo climate correlated and geologic structure correlated Modern: 1950s sonar technology developed during WWII provided detailed knowledge of the structure of the ocean floor
What features are associated with a subduction zone? A hot spot?
Subduction:a deep ocean trench, volcanis arc on the overriding plate parallel to the trench, and a plane of earthquakes , shallow near the trench and descending beneath and beyond the volcanic arc
Hot spot: volcanoes
Why and how are the continents and the oceans fundamentally different?
The rocks that comprise the ocean floor are young and dense created by the process of sea floor spreading. The basement rocks that compromise the continents are old and less dense, so they literally float on a sea of magma underneath